Damper.



W. W. SLOCUM.

DAMPER.

APPLICATION man AUG-22, 191s.

Patented Aug. 13, 1918.

INVENTOR WITNESSES ATTOR N EY m: mmms rzrsns m. PNDTO-LIYNO-. wasumnmn. D. a

WILLIAM W. SLOGUM, 0F MUSKEGON, MICHIGAN.

DAMPER.

Specification of Letters Patent.

Patented Aug. 13, 1918.

- Application filed August 22, 1916. Serial No. 116,326.

To all whom it may concern:

Be it. known that I, WILLIAM W. SLocUM, a citizen of the United States, residing at h Iuskegon, in the county of Muskegon and State of Michigan, have invented certain new and useful Improvements in Dampers, of which the following is a specification.

This invention relates to dampers for stove fiues, furnace fines and exhaust conductors through which the exhaust gases and smoke are discharged from combustible material that is consumed in stoves and furnaces, and the primary object is to provide a device of this character which will cause the hot gases to take a circuitous route in seeking an outlet so that the heat maybe retained within the stove pipe for a longer time than would ordinarily be the case.

A further object of the invention is the provision of a device of this character which will effectively retard the heated gases when the dampers are closed but will allow a free passage for the gases when a free draft is desired in the stove or furnace.

An object that I further seek to obtain is the provision of a damper for stove flues which will be operated through a single damper handle and may be arranged for operation in any ordinary stove or furnace flue without altering the size or capacity thereof.

A further object of this invention is the provision of a damper which consists of comparatively few parts and is simple in construction, but durable and well adapted to withstand the rough usage to which devices of this character are ordinarily subjected.

For a full description of the invention and the advantages and merits thereof, reference is to be had to the following description and the accompanying drawings, wherein is illustrated the preferred form of my invention, in which:

Figure 1 is a longitudinal section through the stove pipe and the device which is mounted therein;

Fig. 2 is a section on the line 22 of Fig. 1;

Fig. 3 is a section on the line 33 of Fig. 1;

Fig. 4 is a perspective view of the parti tions which form the passages in the device, and

Fig. 5 is a detail perspective view of one of the damper plates.

A stove pipe 1 is provided with a plurality of partitions which extend longitudinally of the stove pipe and radiate edgewise from the center line thereof so that three passages, 2, 3 and 41 ape provided through which the gases and smoke from the stove will pass. The partitions'are formed from sheets of thin material and the largest of the sheets is bent to form the partitions 5 and 6 which are disposed from each other at an angle of 120 degrees. A flange 7, provided with rivet holes 8, is provided on each of the partitions whereby the partitions may be secured to the stove pipe 1 by bolts, rivets, screws, or other securing elements. The partition 6 is considerably shorter in length than the partition 5 thereby providing an opening between the passage ways the purpose of which will be hereinafter described. Secured to the partition 5 is a flange 9 which is also secured by rivets or bolts 10 and has extending therefrom at an angle of 120 degrees from the partition 5, the partition 11. A flange 12 is also provided on the partition 11 which has the rivet holes 13 for securing the flange to the stove pipe 1. The length of the partition 11 is the same as the length of the partition 6, but is secured to the partition 5 in a manner that will cause the space, occasioned by the different lengths of the partitions, to be disposed at the opposite end to the end in which the opening or space of the above mentioned partition 6 is situated, as clearly shown in Fig. 4 of the drawing.

A damper plate let is rotatably mounted in the pipe 1 at one end of the partitions and is adapted to rotate on the trunnions 15 and 16 which project through the pipe 1. The trunnion 16 is provided with a handle 17 by which the damper plate 141 may be manually operated. By reference to Fig. 5 of the drawings, it will be observed that the damper plate 1 1 is formed of a segmental piece of material which is provided, along its radial edges with the flanges 18 which are adapted to lie against the partitions when the damper plate is closed. A similar damper plate 19 is pivotally mounted at the opposite end of the partitions and is provided with the trunnions 20 which extend through the pipe 1 so that the damper plate may be easily rotated. The damper plate 19 is also of segmental formation and has the flanges 21 which are adapted to lie against the partition walls.

The trunnions of each of the damper plates are positioned in the pipe 1 in a manner that will cause the segmental damper plate 14 to cover two of the openings at one end of the partitions and the other segmental damper plate 19 to cover two of the passages at the opposite end of the partitions so that one of the passages is completely closed while one of the remaining passages has the opening in one end of the pipe and the other or remaining passage has its opening in the opposite end of the pipe. By virtue of the foreshortened partitions, communicating openings are provided between two of the passages at opposite ends thereof and from this construction it will be observed that the gases or smoke which enter the passage 2 as indicated by the arrows in Fig. 4 will, by reason of the damper plate 19 closing the passage ways 2 and 4: at the outlet end, cause the smoke and gases to pass into the passage way t, will continue until it reaches the communicating opening between the passages 3 and 4:, where it will be again diverted to pass up the passage 3 and out through the pipe 1. The heat and gas are thereby retained in the pipe 1 for a longer period than they would in the ordinary pipe or flue and by thus restricting the free passage of the heated gas more heat will be obtained from an equal amount of combustion.

In order that the damper plates 14 and 19 may be simultaneously operated, I provide a connecting rod 22 which is loosely connected to the damper plates so that when the damped 14 is rotated by means of the handle 17 the damper plate 19 will also be operated and opened, thereby providing a free passage of air through all the passage ways so that the smoke and gases are free to pass through the pipe.

From the foregoing it will be observed that a very simple and durable damper has been provided, the details of which embody the preferred form. I desire it to be understood, however, thatslight changes or modifications in the minor details of construction may be made without departing from the spirit of the invention or the scope of the claim hereunto appended.

I claim A stove flue comprising a plurality of longitudinal partitions radiating edgewise from the center of the flue and spaced approximately 120 from each other, one of the said partitions being longer than the others, the shorter partitions having adjacent ends longitudinally spaced apart to provide passage-ways between the spaces embraced by the partitions, a damper plate arranged at each end of the said partitions, each damper plate being provided with trunnions extending in diflerent planes containing the axis of the pipe and pivotally mounted whereby the axis of one damper plate is disposed diagonally with respect to the axis of the other plate, and a connecting rod loosely connected to the damper plates and movable in the space between two or the partitions for opening both of the damper plates when one of the plates is actuated.

In testimony whereof I atlix my signature in presence of two witnesses.

WILLIAM W SLOCUM.

Witnesses:

JOHN B. BARLow, IoNE MCDONALD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

